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Organic Fertilizers

10 Best Organic Fertilizers 2026 in the United States

#1

Winner

10.0 score

Miracle-Gro Water Soluble All Purpose Plant Food, 10 lb.

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Miracle-Gro Water Soluble All Purpose Plant Food, 10 lb.

Miracle-Gro

10.0 score

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Miracle-Gro Water Soluble All Purpose Plant Food is a versatile, user-friendly fertilizer suitable for various plants, including indoor and outdoor plants, roses, flowers, houseplants, vegetables, and trees. With a significant 10 lb. container, it is designed to cover approximately 4,000 sq. ft. of garden area. This product claims to grow bigger, more beautiful plants compared to those unfed, thanks to its nutrient-rich formula that starts working instantly.

#2
9.4 score

Fox Farm Big Bloom Liquid Plant Food - Organic Bloom Fertilizer for Flowering & Fruiting Plants, Contains Earthworm Castings & Bat Guano - Supports All Stages of Plant Growth - 0-0.5-0.7 NPK, 1Gallon

Fox Farm Big Bloom Liquid Plant Food - Organic Bloom Fertilizer for Flowering & Fruiting Plants, Contains Earthworm Castings & Bat Guano - Supports All Stages of Plant Growth - 0-0.5-0.7 NPK, 1Gallon

FoxFarm

9.4 score

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Fox Farm Big Bloom Liquid Plant Food is an organic fertilizer designed especially for flowering and fruiting plants. It has a low N-P-K ratio of 0-0.5-0.7, providing very little nitrogen but some phosphorus and potassium, which supports blooming and fruit development rather than leafy growth. Its main organic sources are earthworm castings and bat guano, both known for enriching soil naturally and improving plant health.

Rating
9.4
Nutrient Content (N-P-K Ratio)
Source of Organic Matter
Release Rate

Most important from
13284 reviews

Nutrient Content (N-P-K Ratio)
Its low NPK ratio makes it perfect for encouraging root development, flower production, and overall plant health without risking nutrient burn.
Source of Organic Matter
The natural ingredients like bat guano and earthworm castings enrich the soil and nurture beneficial microorganisms, leading to healthier, more robust plants.
Release Rate
Using it every 7-10 days as part of a consistent feeding schedule produces vibrant blooms and lush growth across many plant types.
Application Method
Application is straightforward with clear instructions, and starting with a lower dosage helps avoid overfeeding while still delivering great results.
#3
8.2 score

FoxFarm Soil Liquid Trio Pack - Big Bloom, Grow Big, Tiger Bloom Fertilizers Supports Vigorous Plant Growth, Bud Development & Abundant Fruit - Complete Liquid Plant Food Set - 3 Quart Bottles

FoxFarm Soil Liquid Trio Pack - Big Bloom, Grow Big, Tiger Bloom Fertilizers Supports Vigorous Plant Growth, Bud Development & Abundant Fruit - Complete Liquid Plant Food Set - 3 Quart Bottles

FoxFarm

8.2 score

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The FoxFarm Soil Liquid Trio Pack offers a convenient set of three liquid fertilizers—Big Bloom, Grow Big, and Tiger Bloom—designed to provide complete nutrition for plants at various growth stages. Each formula supports different needs: Big Bloom encourages growth, Grow Big helps with vigorous development, and Tiger Bloom focuses on bud formation and fruit production. This makes the pack a good choice for gardeners growing a variety of plants, including vegetables, roses, and houseplants.

Top 10 Best Organic Fertilizers 2026 in the United States

#1

Winner

10.0  score
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Miracle-Gro

Miracle-Gro Water Soluble All Purpose Plant Food, 10 lb.

Release Rate: Instant
Application Method: Watering can or Garden Feeder

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5% OFF

Chosen by 1193 this week

#2
9.4  score
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FoxFarm

Fox Farm Big Bloom Liquid Plant Food - Organic Bloom Fertilizer for Flowering & Fruiting Plants, Contains Earthworm Castings & Bat Guano - Supports All Stages of Plant Growth - 0-0.5-0.7 NPK, 1Gallon

Nutrient Content (N-P-K Ratio): 0-0.5-0.7
Source of Organic Matter: earthworm castings, bat guano
Release Rate: liquid
Application Method: mix with water; apply every other watering

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#3
8.2  score
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FoxFarm

FoxFarm Soil Liquid Trio Pack - Big Bloom, Grow Big, Tiger Bloom Fertilizers Supports Vigorous Plant Growth, Bud Development & Abundant Fruit - Complete Liquid Plant Food Set - 3 Quart Bottles

Nutrient Content (N-P-K Ratio): 2-8-4
Source of Organic Matter: ingredients from natural sources
Release Rate: quickly
Soil pH Compatibility: low pH
Application Method: mix teaspoons per gallon water

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#4
7.6  score
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Miracle-Gro

Miracle-Gro Shake 'N Feed Tomato, Fruit & Vegetable Plant Food, 4.5 lb.

Nutrient Content (N-P-K Ratio): 10-5-15
Source of Organic Matter: synthetic fertilizer with calcium
Release Rate: about three months
Soil pH Compatibility: may need adjustment for extreme pH
Application Method: shake granules, work into soil, water

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36% OFF
#5
7.6  score
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Osmocote

Osmocote Smart-Release Plant Food Flower & Vegetable - Continuous Release Plant Fertilizer for Vegetables and More, 8 lb.

Nutrient Content (N-P-K Ratio): 14-14-14
Release Rate: slow-release
Application Method: mix into top 1-3 inches soil

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27% OFF
#6
7.3  score
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Neptune's Harvest

Neptune's Harvest Fish & Seaweed Liquid Fertilizer (2-3-1) - 1 Gallon Bottle - Plant Food for Garden - Indoor & Outdoor Organic Plant Fertilizer for Vegetables, Flowers, Fruit, and Lawns

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#7
7.3  score
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Miracle-Gro

Miracle-Gro Shake 'N Feed All Purpose Plant Food, 4.5 lb.

Source of Organic Matter: natural ingredients
Release Rate: up to 3 months release
Application Method: shake granules, work in, water

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19% OFF
#8
7.0  score
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FoxFarm

FoxFarm Soil Liquid Trio Pack - Big Bloom, Grow Big, Tiger Bloom Fertilizers Supports Vigorous Plant Growth, Bud Development & Abundant Fruit - Complete Liquid Plant Food Set - 3 Pint Bottles

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#9
7.0  score
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Osmocote

Osmocote Smart-Release Plant Food Flower & Vegetable, 4.5 lb.

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#10
7.0  score
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Neptune's Harvest

Neptune’s Harvest Organic Tomato & Vegetable Plant Fertilizer (2-4-2) - Liquid Plant Food w/Fresh Fish, Seaweed, Molasses, Yucca Extract, & Humic Acids - for Vegetable Garden (Gallon)

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5% OFF
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Buying Guide for the Best Organic Fertilizers

Choosing the right organic fertilizer for your garden or farm is crucial for ensuring healthy plant growth and soil fertility. Organic fertilizers are derived from natural sources and provide essential nutrients to plants while improving soil structure and promoting beneficial microbial activity. When selecting an organic fertilizer, it's important to consider the specific needs of your plants, the condition of your soil, and the type of crops you are growing. Here are some key specifications to help you make an informed decision.
Nutrient Content (N-P-K Ratio)The N-P-K ratio represents the percentage of nitrogen (N), phosphorus (P), and potassium (K) in the fertilizer. Nitrogen promotes leafy growth, phosphorus supports root development and flowering, and potassium enhances overall plant health and disease resistance. For leafy vegetables, a higher nitrogen content is beneficial, while flowering plants and root crops may require more phosphorus and potassium. Understanding the specific nutrient needs of your plants will help you choose the right N-P-K ratio.
Source of Organic MatterOrganic fertilizers can be derived from various sources such as compost, manure, bone meal, blood meal, and seaweed. Each source has its own nutrient profile and benefits. For example, compost is excellent for improving soil structure and microbial activity, while bone meal is rich in phosphorus. Consider the specific benefits of each source and how they align with your gardening goals. If you aim to improve soil health, compost or manure might be ideal, whereas bone meal or blood meal could be better for boosting specific nutrients.
Release RateThe release rate of nutrients from organic fertilizers can vary. Some fertilizers provide a slow, steady release of nutrients over time, while others offer a quicker nutrient boost. Slow-release fertilizers, such as compost and manure, are ideal for long-term soil health and sustained plant growth. Quick-release options, like fish emulsion or liquid seaweed, are useful for addressing immediate nutrient deficiencies. Consider whether your plants need a quick nutrient boost or a steady supply over the growing season.
Soil pH CompatibilityDifferent organic fertilizers can affect the pH level of your soil. Some fertilizers, like lime, can raise soil pH, making it more alkaline, while others, like sulfur, can lower it, making the soil more acidic. It's important to test your soil's pH before choosing a fertilizer to ensure compatibility. Most plants prefer a slightly acidic to neutral pH (6.0-7.0). If your soil pH is outside this range, select a fertilizer that will help bring it closer to the optimal level for your plants.
Application MethodOrganic fertilizers come in various forms, including granular, liquid, and powder. Granular fertilizers are easy to apply and provide a slow release of nutrients. Liquid fertilizers are quickly absorbed by plants and are ideal for foliar feeding or addressing nutrient deficiencies. Powdered fertilizers can be mixed with water or applied directly to the soil. Consider the ease of application and the specific needs of your plants when choosing the form of fertilizer. For example, liquid fertilizers are great for container plants, while granular options are suitable for larger garden beds.

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